Certain propeller driven aeroplanes are equipped with piston engines whose fundamental "firing"-frequency coincides with the rotational frequency of the propeller. Taking the two sources as a system ...

The effects of the ground on propeller noise have now been measured experimentally. The effects of the ground on propeller noise have been measured experimentally for the very first time by ...

THE primary purpose of this paper is to discuss some of the most pressing problems involved in choosing the propeller that is most suitable for use on a particular airplane. Propeller design is not ...

Hartzell’s 5-blade composite propeller reduces aircraft weight by around 20 pounds total by using carbon fiber construction ...